VANCOUVER, BC - JUNE 15: Riot police walk in the street as a couple kiss on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Rich Lam/Getty Images)(Rich Lam/Rich Lam/Getty Images)

A Canucks fan takes a picture of himself in front of a burning car at the corner of Hamilton Street and Georgia Street after the Bruins won the Stanley Cup in Vancouver.(Rafal Gerszak for The Globe and Mail/Rafal Gerszak for the Globe and Mail)

Canucks fans riot at the corner of Hamilton Street and Georgia Street after the Bruins won the Stanley Cup in Vancouver(Rafal Gerszak for the Globe and Mail/Rafal Gerszak for the Globe and Mail)

Canucks fans riot at the corner of Hamilton Street and Georgia Street after the Bruins won the Stanley Cup in Vancouver.(Rafal Gerszak for The Globe and Mail/Rafal Gerszak for The Globe and Mail)

The social dynamics that accompany riots are undoubtedly more complex today than they once were.(ANTHONY BOLANTE/Anthony Bolante/Reuters)

Vancouver Canucks fans watch a car burn during a riot following game 7 of the NHL Stanley Cup final in downtown Vancouver, B.C., on Wednesday, June 15, 2011. THE CANADIAN PRESS/Geoff Howe(GEOFF HOWE/Geoff Howe/The Canadian Press)

Canucks fans riot at the corner of Hamilton Street and Georgia Street after the Bruins won the Stanley Cup in Vancouver, British Columbia.(Rafal Gerszak for The Globe and Mail/Rafal Gerszak for The Globe and Mail)

Vancouver Canucks fans fight during riots after the Canucks lost Game 7 of the NHL Stanley Cup playoffs to the Boston Bruins in downtown Vancouver, British Columbia June 15, 2011. Riot police fired tear gas to control a mob that turned violent in downtown Vancouver on Wednesday after the game. REUTERS/Anthony Bolante (CANADA - Tags: SPORT ICE HOCKEY CIVIL UNREST)(ANTHONY BOLANTE/Anthony Bolante/Reuters)

Canucks fans riot at the corner of Hamilton Street and Georgia Street after the Bruins won the Stanley Cup in Vancouver.(Rafal Gerszak for The Globe and Mail/Rafal Gerszak for The Globe and Mail)

Canucks fans riot at the corner of Hamilton Street and Georgia Street after the Bruins won the Stanley Cup in Vancouver.(Rafal Gerszak for the Globe and Mail/Rafal Gerszak for the Globe and Mail)

Vancouver Canucks fans riot following game 7 of the NHL Stanley Cup final in downtown Vancouver, B.C., on Wednesday, June 15, 2011. THE CANADIAN PRESS/Geoff Howe(GEOFF HOWE/Geoff Howe/The Canadian Press)

VANCOUVER, BC - JUNE 15: Police on horseback ride through the street past a fire on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)(Rich Lam/Richard Lam/Getty Images)

People push over a vehicle in Vancouver after the Canucks lost Game 7 of the Stanley Cup Final to the Boston Bruins.(Mike Carlson/Reuters)

People take photos of an overturned burned pickup truck during riots in downtown Vancouver after the Canucks lost Game 7 of the NHL Stanley Cup Final to the Boston Bruins.(Anthony Bolante/Reuters)

People watch as firefighters put out the flames of a vehicle burning in Vancouver during riots in downtown Vancouver after the Canucks lost Game 7 of the NHL Stanley Cup Final to the Boston Bruins.(Mike Carlson/Reuters)

A man waves Canadian and British Columbia flags in front of an overturned burning pickup truck during riots in downtown Vancouver after the Canucks lost Game 7 of the NHL Stanley Cup Final to the Boston Bruins.(Anthony Bolante/Reuters)

A man in a Canucks jersey jumps from an overturned police car onto another police vehicle during riots after the Canucks lost Game 7 of the NHL Stanley Cup Final to the Boston Bruins.(Darryl Dyck/The Canadian Press)

A police car burns during a riot in downtown Vancouver following the Vancouver Canucks? 4-0 loss to the Boston Bruins in Game 7 of the Stanley Cup Final.(Geoff Howe/The Canadian Press)

Vancouver police detain a man during riots after the Canucks lost Game 7 of the Stanley Cup Final to the Boston Bruins.(Mike Carlson/Reuters)

A man confronts Vancouver police during riots after the Canucks lost Game 7 of the Stanley Cup Final to the Boston Bruins.(Mike Carlson/Reuters)

A woman poses for photos in front of an overturned pickup truck as it burns in downtown Vancouver a during rioting after the Canucks lost the Stanley Cup Final to the Boston Bruins.(Anthony Bolante/Reuters)

Rioters burn police cars in Vancouver after the Canucks were defeated by the Boston Bruins in Game 7 of the Stanley Cup Final.(Darryl Dyck/The Canadian Press)

A Vancouver police officer waves a baton as he attempts to control the crowd during a riot after the Canucks lost Game 7 of the Stanley Cup Final to the Boston Bruins.(Anthony Bolante/Reuters)

A man throws a smoking canister back at the police in Vancouver during riots after the Canucks lost Game 7 of the Stanley Cup Final to the Boston Bruins.(Mike Carlson/Reuters)

People watch as a police car burns during a riot after the Canucks were defeated by the Boston Bruins in the Stanley Cup Final.(Andy Clark/Reuters)

VANCOUVER, BC - JUNE 15: Riot police walk in front of a burning vehicle on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)(Rich Lam/Rich Lam/Getty Images)

Vancouver riot police fire tear gas at Hamilton Street and Georgia Street after the Boston Bruins won the Stanley Cup.(Rafal Gerszak for The Globe and Mail)

Rioters kick in the windshield of a police cruiser at the corner of Cambie Street and Georgia Street in Vancouver after the Boston Bruins beat the Canucks to win the Stanley Cup.(Rafal Gerszak for The Globe and Mail)

Cars burn during a riot after the Canucks lost to the Boston Bruins in Game 7 of the Stanley Cup Final.(Ryan Remiorz/The Canadian Press)

An overturned car sits on a Vancouver sidewalk after riots following the Canucks? Game 7 loss to the Boston Bruins.(Andy Clark/Reuters)

Looters run through the smashed windows of a Sears store in downtown vancouver after the Canucks lost to the Boston Bruins in Game 7 of the Stanley Cup Final.(Mike Carlson/Reuters)

A security guard stands outside a bank damaged during riots in downtown Vancouver after the Canucks lost Game 7 of the NHL Stanley Cup Final to the Boston Bruins.(Andy Clark/Reuters)

Vancouver riot police officers stand ready at Hamilton Street and Georgia Street during riots in downtown Vancouver after the Canucks lost Game 7 of the NHL Stanley Cup Final to the Boston Bruins.(Rafal Gerszak for The Globe and Mail)